Analyzing the Multiwavelength Spectrum and Variability of BL Lacertae During the July 1997 Outburst

Details Analyzing the Multiwavelength Spectrum and Variability of BL Lacertae During the July 1997 Outburst Analyzing the Multiwavelength Spectrum and Variability of BL Lacertae During the July 1997 Outburst

1998-06-18

arxiv.org/abs/astro-ph/9806249v2

Astronomy and Astrophysics

Astrophysics

Now accepted for publication in The Astronomical Journal. Significantly extended discussion w.r.t. original version. 3 Figures

Scientific paper

The multiwavelength spectrum of BL Lacertae during its July 1997 outburst is analyzed in terms of different variations of the homogeneous leptonic jet model for the production of high-energy radiation from blazars. We find that a two-component gamma-ray spectrum, consisting of a synchrotron self-Compton and an external Compton component, is required in order to yield an acceptable fit to the broadband spectrum. Our analysis indicates that in BL Lac, unlike other BL Lac objects, the broad emission line region plays an important role for the high-energy emission. Several alternative blazar jet models are briefly discussed. In the appendix, we describe the formalism in which the process of Comptonization of reprocessed accretion disk photons is treated in the previously developed blazar jet simulation code which we use.

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